Improvement in combined globe-valves and traps



Combined Globe VaHes and Traps.

N0. 136,746, v PatentedMrchLlS'-B.

AmPHamfLhwaSR/amlc ca lv. dass oRNE's macsss) i Philadelphia, countyPATENT OFFICE.

HUGH J'. MOMAHON, OF PHILADELPHIA, PENNSYLVANIA.

IMPRVEMENT` IN lCOMBINED GLOBE-VALVES AND TRAPS.

Specification forming part of Letters Patent No. 136,746, dated March11, 1873.

To all whom it may concern:

Be it known that I, HUGH J. MCMAHON, of of Philadelphia and State ofPennsylvania, have invented an Improvement in Waste Cocks forSteam-Heatin g Apparatus, of which the following is a specication:

The object of my invention is to prevent the accumulation of water ofcondensation in steam-heating pipes, and to prevent the disagreeablenoises which result from such accumulation of water.

This object I attain by making, through the valve B of the Waste-cock Aof a system of steam-heating pipes, a passage, a, the area of which canbe so regulated by a set-screw, b, or its equivalent, as to afford asuicient outlet, when the valve is closed, for the water of condensationwithout permitting the steam to escape.

It is usual in heating buildings with steam l to employ, in connectionwith each system of coils, two cocks, one for regulating the admissionof steam to, and the other for regulating its escape from the coil, thelatter being generally termed a waste-cock, a vertical section of whichis shown in Figure 1, and on a smaller scale in Fig. 2.

This cock is of the usual construction, the casing inclosing aninlet-chamber, d, and outlet-chamber df, separated from each other by apartition,'e, having an opening, on the edge of which is formed a seatfor the valve B. A passage, a, is made in this valve, the passage beingcontinued through an inclined groove formed in a set-screw, b, byadjusting which in the end Aof the valve B the outlet ofthe passagemaybe enlarged or diminished at pleasure, and the screw is always soregulated that while the water of condensation can be gradually forcedby the steam through thepassage from the inlet to the outlet chamber,the water itself presents an obstruction to the escape of steam; thusthe accumulation of water in the system of pipes, and the disagreeablejars caused by such accumulation, are obviated.

I prefer the making of the escape-passage in the valve B, and regulatingthe outlet of the passage by means of a grooved set-screw, in the mannerdescribed; but the same result will be attained by making an opening inthe partition e, and adapting to that opening a screw-rod, k, having aninclined groove, and passing through the casing, as shown by dottedlines in Fig. l; in fact any communication between the inlet and outletchambers of the cock, the area of which can be readily increased ordiminished, will serve the desired purpose.

I claim as my invention- The combination, with the waste-cock, of apassage between the inlet andoutlet chambers and a grooved screw, b, orits equivalent, for regulating the area of the said passage.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HUGH J. MCMAHON.

Witnesses:

WM. A. STEEL, J oHN K. RUPERTUS.

